Emory i



(No Model.)

E. I. NICHOLS. ELECTRIC ROTARY PUMP.

No. 425,106. Patented Apr. 8, 1890.

UNITED STATES PATENT OFFICE.

EMORY I. NICHOLS, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR, BY MESNEASSIGNMENTS, TO IRVINE STEIVART AND FRANK E. TREMPER, OF SAME PLACE.

ELECTRIC ROTARY PU M P.

SPECIFICATION forming part of Letters Patent No. 425,106, dated April 8,1890.

7 Application filed March 13, 1889. Serial No. 303,161. (No model.)

To (0% whom it may concern.-

Be itknowu that I, EMORY I. NICHOLS, of the city and county of SanFrancisco, and State of California, have invented an Improvement inElectric Rotary Pumps; and I declare the following to be a full, clear,and exact description thereof.

My invention relates to the class of rotary pumps.

The object of my invention is to provide a simple and effectiveelectrically-driven pump; and to this end my invention consists inwrapping the revoluble shell of arotary pump with wire in such a manneras to form'an armature of an electric motor.

Referring to the accompanying drawings, Figure 1 is a vertical sectionof my electric rotary pump. Fig. 2 is a horizontal section of same, thewire-wrapping in both figures being but partially shown.

A is a fixed hollow shaft, one end of which forms the inletport a, andthe other end forms the outlet-port a. The shaft is formed with aneccentric center 13, having the encircling port I), communicating withthe inlet and discharge ports, as shown in Fig. 2.

Upon shaft A is mounted and adapted to revolve the shell C, which,inclosing the cocentric center B, forms at one part or line an abutmentI5 and at the remaining portion a water-space Z1 Suitable packing andstuffing boxes are used between the parts.

In the shell C are the swinging pistons D, controlled by springs (Z andoperating against the circumference of the eccentric center. This formsa rotary pump, the operation of which, upon revolving the shell C, isobvious. To revolve this shell I make the pump, or a rim connectedtherewith, form the core of an armature of an electric motor. This isdone by properly wrapping the shell with wire E, so as to form anelectric armature. This wrapping may be done in any suitable manner, andit may be directly on the shell; or, as here shown, it may be upon a rimF, carried by the shell.

I have not herein deemed it necessary to show any of the parts of anelectric motor, as they do not form part of my invention.

It is sufficient, therefore, to show an electric armature, of which thepump or its rim F forms its core, the position and function of thearmature in an electric motor being well known.

I do not confine myself .to the particular construction and arrangementof the pump parts herein shown, as these may be varied to any extentWithout changing the principle of my invention, which is to construct anelectric-motor armature of which a rotary 6o pump or a connected partforms its core.

The operation of the device is as follows: The electric current passingthrough the brushes (not here shown) and energizing the armature, thelatter is revolved by the fieldmagnets. (Not shown.) The shell C isthereby rotated, and, through its pistons, sucks in and forces out thewater. An advantage of this form of armature lies in the fact that byreason of the hollow journals through which the water is passing thereis no liability to that drawback of hot journals to which highspeedelectric motors are subject.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

An improved rotary pump comprising a fixed hollow shaft having an inletand outlet port, said shaft having also an eccentric center with anencircling port communicating with the inlet and outlet ports, a rimformed with the revoluble shell, and a wrapping of Wire upon the rim "toform of said shell an electric-motor armature, as herein described.

In witness whereof I have hereunto set my hand.

EMORY I. NICHOLS.

Vitnesses:

S. H. NoURsE, H. 0. LEE.

